Both Abby and Harley are grumpy when they're sleepy, I don't know which one is worse!
Abby will sometimes growl aggressively and try to snap at whatever touches her (usually Harley's foot, poor boy). She's always covered in a blanket when put to bed so doesn't know what's touched her. Harley gets grumpy if he thinks you're trying to move him (like if I'm trying to get a blanket which he's partially lying on).